test-fallback-socks5-proxy.py: check that the same proxy can't be added twice
test-fallback-socks5-proxy.py: check that the same proxy can't be added twice

Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble